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Has files: YesSubject: search.filters.subject.Moisture retention characteristics of soil

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    Moisture retention characteristics and hydraulic conductivity of alluvial (Entisol) and brown hydromorphic (Alfisol) soils of Kerala
    (Kerala Agricultural University, 1985) Antony, P C; Koshy, M M
    The maximum water holding capacity, field capacity, moisture retained at tensions of 1 , 5, 10 and 15 bar were highest in brown hydromorphic soils and those diminished in the order of riverine alluvium and coastal alluvium soils. Available water was highest in the brown hydromorphic soils followed by riverine alluvium and coastal alluvium. The saturated hydraulic conductivities of the soils were relatively high. The hydraulic conductivities of the undisturbed soils were found to be more than that of the disturbed samples even for the same bulk densities. Infiltration rates of all the soils were relatively high.
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    Moisture retention characteristics of red and forest soils of Kerala
    (Kerala Agricultural University, 1985) Reena Mathew; Vikraman Nair, R
    Moisture retention studies of red and forest soils were conducted at the College of Horticulture at six different tensions ranging from 0.3 to 15 bar. The results revealed that the clayey textured forest soil retained higher moisture at all the tensions than red soil which is sandy c!ay loam in texture. The field capacity and wilting coefficient values were 24.85 and 18.15 per cent, respectively for forest soil as against 10.45 and 7.21 percent for red soil. About 50 percent of the available water was removed when the tension increased from 0.3 to 1 bar. Significant positive correlations were obtained between moisture contents at different tensions and the contents of clay and silt while the relation with fine sand was significant and negative. Organic carbon failed to show any significant influence on moisture retention but the content of gravel had a depressing effect on moisture percentage especially at 0.3 bar. Regression equations with high predictability have been developed to estimate field capacity and witting coefficient from the contents of organic carbon, textural separates and gravel.